After chromate passivation， the zinc coating forms white， colorful and military green， which is beautiful and generous and has certain decoration;
7Filling: welded pipe is welded by electric welding of hot-rolled strip steel， so its influence was not as high as that of seamless steel pipe.
sSt. Catherine Mixed pass system. According to the characteristics of rolling mills and products， in order to give full play to the advantages of their respective systems and overcome their disadvantages，Products Show mixed pass system is often adopted，وانغ شيA106GR . ب ) سلس الأنابيبمبادئ الاختيار والمناسبات القابلة للتطبيق that is， the combination of more than two systems. For example， straight leg cross rolling pass system is adopted for finished hole and front hole of finished product， and bent leg cross rolling system is adopted for other passes; or direct rolling system is adopted for rough rolling hole and straight rolling system is adopted for the last ~ finish rolling holes Leg oblique tie hole， etc.
In order to strengthen the "muscles and bones" of the bridge， the construction party specially paved two layers of reinforcement mesh before pouring cement.
Vkuala selangor There is a great demand for welded steel mesh in Chinas market.
UcWith the development of Chinas infrastructure， the investment in infrastructure continues to grow; Implement the strategy of western development. Economic construction has entered a new stage， and the demand for welded steel mesh for capital construction such as power， transportation，Products Show water conservancy， housing and municipal engineering will increase exponentially.
There is a great demand for welded steel mesh in Chinas market.
The third is the welding machine， which must ensure reliable performance and meet the process needs; The welding machine must have qualified ammeter and voltmeter to ensure the correct implementation of welding process. The welding cable shall not be too long， and the welding parameters shall be adjusted when it is too long.
gI-beam: national standard * what is the wall thickness of I-beam
FPrecautions for galvanized pipe storage
RTotal quality managementSince the s， with the rapid development trend of high-quality hot strip mill production and the development of electric welding and testing technology， the welding quality has been continuously improved， the types， specifications and models of welded steel pipes are increasing， and seamless pipes have been replaced in more and more industries. Welded steel pipes are divided into straight seam welded pipes and spiral welded pipes according to the way of welding. Classified by production mode: classified by processing technology - electric arc welded pipe， resistor welded pipe，Products Show (high frequency， furnace welded pipe.
jLAre there many welded types of mesh produced? According to the welding type and overall improvement，وانغ شيA106GR . ب ) سلس الأنابيبمبادئ الاختيار والمناسبات القابلة للتطبيق the difference between the reinforcement mesh and the welded mesh is not particularly large. It is still due to the scattered quality of the southern city. From the perspective of development to the longitudinal and transverse interleaving devices of the reinforcement mesh， the bound or welded mesh has better application quality.
Compared with manual binding， welded steel mesh can reduce the occurrence of cracks by more than %. The use of reinforcement mesh can make the project construction faster. As long as the reinforcement mesh is laid as required， eliminating the links of reinforcement on-site cutting， placing one by one and binding. It can save % - % of working hours， greatly accelerate the construction progress and shorten the construction cycle.
Since the s， with the rapid development trend of high-quality hot strip mill production and the development of electric welding and testing technology， the welding quality has been continuously improved，Reinforcement, galvanized pipe, seamless pipe, welded pipe, alloy pipe, I-beam-Shandong Kaiwen metal material Co., Ltd the types， specifications and models of welded steel pipes are increasing， and seamless pipes have been replaced in more and more industries. Welded steel pipes are divided into straight seam welded pipes and spiral welded pipes according to the way of welding. Classified by production mode: classified by processing technology - electric arc welded pipe， resistor welded pipe， (high frequency， low frequency) gas welded pipe furnace welded pipe.
Safety and healthxDue to the impact of poor visual . Only through the application of mesh and the overall stiffness can we see the potential of demand. The application of steel data is a high one， such as the reuse rate of mesh and reinforcement installed in the current mesh production company and the treatment of corrosion. The design strength value of circular reinforcement and the design strength value of welded reinforcement mesh. According to the equal strength substitution principle and considering comprehensive factors， the use of steel welded mesh plate can save the use of steel bars in the steel welded mesh plate factory. And the reinforcement mesh needs to be processed after it is shipped to the site， so there is no wear.
RDue to the relatively high and narrow section size of ordinary I-beam and light I-beam， the moment of inertia of the two main sleeves of the section is quite different which makes it very limited in the scope of application. The use of I-beam shall be selected according to the requirements of design drawings.
Why are galvanized pipes so good?
rSt. CatherineFilling: welded pipe is welded by electric welding of hot-rolled strip steel， so its influence was not as high as that of seamless steel pipe.
gMThe use of welded steel mesh in China is still in its infancy. At present the use of welded steel mesh in China accounts for less than one of the total amount of steel reinforcement. In the early s， steel welded mesh was listed as a key implementation project by the science and Technology Commission and the Ministry of construction， and specifications and procedures were formulated.
The second is the control of welding materials to ensure that the welding materials purchased are from formal channels， with quality assurance certificate and certificate， which meet the process requirements; The recovery of welding rod head shall be strictly controlled to ensure the flow direction and dosage; Welding materials shall be baked in strict accordance with the process， and the amount of one-time distribution shall not exceed half a day.